Measurement of Down-Track Correlation for Perpendicular Magnetic Media With Various Inter-Granular Exchange Coupling

Author

Miura, Kenji ; Sudo, Daisuke ; Hashimoto, Mitsuhiro ; Muraoka, Hiroaki ; Aoi, Hajime ; Nakamura, Yoshihisa

Author_Institution

RIEC, Sendai

Volume

42

Issue

10

fYear

2006

Firstpage

2261

Lastpage

2263

Abstract

In order to attain high track density, track-edge noise was studied in conjunction with the fine magnetic structure of perpendicular media. The track-edge noise was increased in media with stronger exchange coupling. The down-track correlation length was measured and compared with the cross-track correlation length. The track-edge noise and correlation length depended upon the inter-granular exchange coupling of the media. Magnetic isolation of grains and steep head field gradient along the cross-track direction is expected to improve the write resolution at the track-edges

Keywords

magnetic recording noise; magnetic structure; perpendicular magnetic recording; cross-track correlation length; down-track correlation measurement; fine magnetic structure; high track density; inter-granular exchange coupling; magnetic cluster; magnetic isolation; perpendicular magnetic media; perpendicular magnetic recording; track-edge noise; write resolution; Couplings; Jitter; Magnetic analysis; Magnetic heads; Magnetic noise; Magnetization; Noise generators; Noise measurement; Noise reduction; Perpendicular magnetic recording; Down-track correlation length; magnetic cluster; perpendicular magnetic recording; track density; track-edge noise;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2006.879575

Filename

1704266